Attenshun space nerds with NASA underpants! NASA is now offering some really awesome ringtones for your iPhone, Android or whatever other phone you have. You must must must get these. MUST.
They include classics like Apollo 11's "Tranquility Base here—the Eagle has landed", Apollo 13's "Houston, we have a problem" or JFK's thrilling "We choose to go to the Moon..." from his Rice University speech. You will also find rare clips from the Mercury missions, Saturn's weird radio sounds, its moons or Sputnik's beep, which is great if you want to wake up all Soviet every morning.
Download them in MP3 and Ringtone format at [NASA]